The five MRI predictors for difficult laryngoscopy identified by binary multivariate logistic regression (Enter) model
| Variable | β | SE | P value | OR | 95% CI |
| DSH* | −0.24 | 0.37 | 0.51 | 0.79 | 0.38 to 1.62 |
| DSE* | −0.59 | 0.38 | 0.12 | 0.56 | 0.27 to 1.16 |
| DST* | −0.96 | 0.85 | 0.26 | 0.38 | 0.07 to 2.04 |
| DSV* | −0.83 | 0.49 | 0.09 | 0.44 | 0.17 to 1.13 |
| DSS* | 0.15 | 0.27 | 0.59 | 1.16 | 0.68 to 1.96 |
↵*Adjusted by sex, age and body weight.
DSE, distance from skin to epiglottis; DSH, distance from skin to hyoid bone; DSS, distance from skin to anterior to the trachea at the level of the suprasternal notch; DST, distance from skin to thyroid cartilage at the level of the vocal cords; DSV, distance from skin to vocal cords.